Acid Marks On Limestone

[hmtiling]

I would test wax off , or similar, if after the wax off the blemishes are the same , then we may need mechanical as above, may be lucky if they got it up quick or she topped up or similar

Many thanks

 

[Concrete guy]

Which brushes would you recommend if it comes to that please?

I'd probably go with #120 grit as it would be reasonably gentle but still remove some of the surface. If you need something more coarse you can drop down a grit or two. They aren't expensive but you'll need a variable speed grinder or polisher to use it on.

 

[hmtiling]

The wax off worked. Thanks guys

 

[Dumbo]

The wax off worked. Thanks guys

Had a similar one Mr muscle on terracotta it had only attacked the wax strip and reseal did it